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I was doing my homework _______ a dog came in. A. when B. while C. as D. At

2023-01-28 20:46:21   100次   2015届广东福泉奥林匹克学校八年级下期中英语试卷（解析版）   单项填空   反馈错误   加入收藏   正确率 : 100%  

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